What Does Performance Qualification Mean for Infrared Instruments?

Performance qualification (PQ) tests are a vital component of the steps regulated laboratories do to maintain compliance. Therefore, it is essential to understand and apply meaningful PQ tests. However, what does PQ mean in practice for infrared (IR) instruments? The answer may surprise, or even horrify, you.
In last September's 'Focus on Quality' column, we presented an analysis of FDA 483 observations and warning letters for infrared instruments and analysis (1). In this article, we are returning [...]